HDI PCB kupanga mu fakitale ya PCB yokha --- OSP pamwamba kumaliza
Adalemba:Feb 03, 2023
Magulu: Mabulogu
Tags: pcb,pcba,pcb msonkhano,kupanga pcb, pcb pamwamba kumaliza,HDI
OSP imayimira Organic Solderability Preservative, yomwe imatchedwanso kuti circuit board organic coating yopangidwa ndi opanga PCB, ndiyotchuka Yosindikizidwa Circuit Board pamwamba kumaliza chifukwa chotsika mtengo komanso yosavuta kugwiritsa ntchito popanga PCB.
OSP ikugwiritsa ntchito organic pawiri kuyika mkuwa wosanjikiza mosankha kupanga zomangira zamkuwa musanatenthedwe, ndikupanga wosanjikiza wazitsulo kuti atetezere mkuwa wowonekera ku dzimbiri.Kukhuthala kwa OSP, ndikoonda, pakati pa 46µin (1.15µm) -52µin(1.3µm), kuyezedwa ndi A° (angstrom).
Organic Surface Protectant ndi yowoneka bwino, yosawoneka bwino.Mu soldering yotsatira, idzachotsedwa mwamsanga.Njira yomiza mankhwala ingagwiritsidwe ntchito pokhapokha njira zina zonse zitachitidwa, kuphatikizapo Kuyesa kwa Magetsi ndi Kuyendera.Kuyika mapeto a OSP ku PCB nthawi zambiri kumaphatikizapo njira yotumizira mankhwala kapena thanki yoyikira.
Njirayi nthawi zambiri imawoneka motere, ndi ma rinses pakati pa sitepe iliyonse:
1) Kuyeretsa.
2) Kukweza kwapamtunda: Malo amkuwa owonekera amadutsa pang'ono-etching kuti awonjezere mgwirizano pakati pa bolodi ndi OSP.
3) Acid muzimutsuka mu njira ya sulfuric acid.
4) Ntchito ya OSP: Panthawiyi, njira ya OSP ikugwiritsidwa ntchito ku PCB.
5) Kutsuka kwa deionization: Yankho la OSP limalowetsedwa ndi ma ions kuti athetse mosavuta panthawi ya soldering.
6) Yanikani: Pambuyo pa OSP kumaliza, PCB iyenera kuuma.
Kumaliza kwa OSP ndi imodzi mwazomaliza zodziwika bwino.Ndi njira yachuma kwambiri, yosamalira zachilengedwe yopangira matabwa osindikizidwa.Iwo akhoza kupereka co-planar ziyangoyango pamwamba pa phula zabwino / BGA / zigawo zazing'ono masungidwe.OSP pamwamba ndi okonzeka kwambiri, ndipo safuna kukonza zipangizo mkulu.
Komabe, OSP siyolimba monga momwe amayembekezera.Ili ndi zoyipa zake.OSP imakhudzidwa ndi kagwiridwe ndipo imafuna kugwiridwa mosamalitsa kuti ipewe zokala.Nthawi zambiri, kugulitsa kangapo sikumaperekedwa chifukwa kugulitsa kangapo kungawononge filimuyo.Nthawi yake ya alumali ndi yayifupi kwambiri pakati pa zomaliza zonse.Mapulaniwo ayenera kusonkhanitsidwa atangogwiritsa ntchito zokutira.M'malo mwake, opereka PCB amatha kuwonjezera moyo wake wa alumali pokonzanso kangapo kumaliza.OSP ndiyovuta kuyesa kapena kuyang'ana chifukwa cha mawonekedwe ake.
Zabwino:
1) Yopanda kutsogolera
2) Pansi yosalala, yabwino pamapadi omveka bwino (BGA, QFP...)
3) Chophimba chochepa kwambiri
4) Itha kugwiritsidwa ntchito limodzi ndi zomaliza zina (mwachitsanzo OSP + ENIG)
5) Mtengo wotsika
6) Reworkability
7) Njira yosavuta
Zoyipa:
1) Si zabwino kwa PTH
2) Kugwira Mwachangu
3) Moyo wa Shelufu Waufupi (<6 miyezi)
4) Osayenerera ukadaulo wa crimping
5) Osakhala bwino kwa kubwereza kambiri
6) Mkuwa udzawululidwa pamsonkhano, umafunika kusinthasintha kwaukali
7) Zovuta kuwunika, zitha kuyambitsa zovuta pakuyesa kwa ICT
Kagwiritsidwe kake:
1) Zipangizo zabwino zoyikira: Kumaliza uku ndikwabwino kugwiritsa ntchito pazida zoyikira bwino chifukwa chosowa mapepala olinganiza kapena malo osagwirizana.
2) Ma board a seva: Ntchito za OSP zimachokera ku mapulogalamu otsika mpaka ma board apamwamba a seva.Kusiyanasiyana kosiyanasiyana kumeneku kumapangitsa kukhala koyenera kwa mapulogalamu ambiri.Amagwiritsidwanso ntchito nthawi zambiri pomaliza kusankha.
3) Ukadaulo wa Surface Mount (SMT): OSP imagwira ntchito bwino pakuphatikiza kwa SMT, pakafunika kumangiriza gawo limodzi pamwamba pa PCB.
Kubwereraku Blogs
Nthawi yotumiza: Feb-02-2023
